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Old   November 8, 2010, 01:10
Unhappy help in residence time calculation
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xinlei hu
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hi everyone
I am doing a simple modeling with a inlet, a chamber and a outlet for resident time distribution. The fluid is defined as water(or water and O2). I do it by the tutorial but i can not got the result:
1.Activate species transport model using the Define:Models:Species:Transport and Reaction panel.
Q: When I activate the species transport model, the mixture must be selected, how can i find a mixture of h2o and h2o?
2.In the Define:Materials panel, create a new fluid species “tracer” with the same physical
properties as the test fluid.
Q: I can not manage to creat the new "tracer" with the physical properties as water.
3.For the mixture material in the Define: Material panel, select following properties.
a. Mixture species: tracer and test fluid
b. Density: volume-weighted-mixing-law
Q for there was no tracer created, or the created tracer did not appear in this panel, so I can not do this step.
4.In the Define: Boundary Condition panel, set the tracer mass fraction at the inlet equal to zero.
Q: where is the tracer mass fraction, I can not find it?
5.Disable the tracer species equation in the Solve:Controls:Solution panel.
Q: can not find the "tracer species equation"
6.Define a Surface Monitor to monitor the area-weighted-averaged concentration of tracer mass
fraction with flow time at the outlet. Activate the Plot and Write options to write the monitor data to a
Q: can not find the "the area-weighted-averaged concentration of tracer mass
may anyone help?
great thanks!
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